I'm not sure if the problem is at the hardware, it looks like a bug in the firmware, the amplifier turns on and off when playing. It is heard on Sennheiser IE 40 PRO - 20 ohm, but not heard on Sennheiser HD 599 - 50 ohm, and Beyerdynamic DT 990 PRO - 250 ohm.https://www.mediafire.com/file/h6rz2padoheoi2k/clicker.wav/file

I experienced the same issue with a different device. Turned out to be a hardware issue so I had to send it back. At least the store gave my money back even though their customer service was terrible. They couldn't even provide me their zip code info, that's just crazy.

If you gonna make a band for the M5 than it would be nice if it was available,the dumb shit that y'all(you people)do makes no fucking sense,If you are gonna make shit worldwide than make it available or hire someone with worldwide marketing experience.